Pencil sharpener



H. DORNSEIF PENCIL SHARPENER Filed Nov. 1', 1922 V [12 mm fwr 3 Patented Dee. 23, 1924..

Application filed November 31, E922. Elerllal Eire. ceases.

To all whom it may concern:

Be it known that l, Hnoo Domvsnn a citizen of Germany, residing at. ltadevormwald, Rheinland, Germany, have invented certain new and useful Improvements in Pencil Sharpeners, of which the following is a specification. 1

My invention has reference to a pencil sharpener which may be carried in the pocket and is provided with a supply of exchangeable knives, and with this end in view provision is made for connecting with the pencil sharpener a suitable container for the reception of a supply of exchangeable knives, so as to enable the operator to always have a sharpened fresh knife at his disposal in case of need and to do away with the tedious ire-grinding of the knives.

The invention is particularly adapted for that kind of pencil sharpener which comprises a substantially prismatic body with conical aperture, and in accordance with my invention the container for the knives may be formed in the most simple manner bya recessed part of the prismatic body laterally arranged with relation to the conical aper ture. 'lhis recess or cavity is preferably arranged upon the side of the device 0 osite to the operating knife and is preiera' ly arranged in such a manner as to substantially register with the recess for the accommodation of the operating knife on the opposite side of the body portion of the device. By this means the advantage is obtained that the operating blade and the supply blades may be retained by the same screw which passes through a transverse aperture of the body portion of the device.' The .arrangement may be such that the recessed portion on both sides of the body may be of the same size so that they may be manufactured by means of one and the same tool or the like. The fastening screw is preferably inserted from the side of the operatin knife and is passed through the transverse re of thebody portion and into a preferably inwardly threaded bore of the cover for the An embodiment of the principles of my invention is shown on the accompanying drawing by way of example- In Fig. l in front view,

In Fig. 2 in rear view, and

In Fig. 3 in plan view.

Fig. i is a rear view of the pencil sh'arpener with a knife container in the open position. Fig. 5 is a cross-sectional view 5-5 of Fig. l and Fig. 6 is a longitudinal section on the line 6-6 oi Fig. l.

As shown on the drawings, the pencil sharpener comprises a substantially prismatic body portion a of some light metal, an aluminium alloy for example, and is provided with a lengthwise extending, eccen-' trrcally? arranged conical hole 5 and witha longitudinal slot 0. Upon the front side of the body portion-a recess d is provided in which by means of a screw f the knife 9 is removably secured, the cutting edge of which projects through the slot 0 into the conical hole I).

' Upon the side of the body portion opposite the knife 9, that is to say, on the rear side of the body a a recess it is provided of the same configuration, but of greater depth than the recess (2 and registering therewith. The cavity or recess it upon the rear-side or the body' is'provided with a covering lidc" and constitutes a container for the reception of a plurality, for instance of two supply knives is. These knives are retained in position according to my invention by the fastening screw f of the operating knife 9. For this purpose the screw f is passed through a transverse hole m in the body a and through the ordinary fastening holes in the hives g, k, k and enters into the interiorly threaded bore 11. of the lid 2'. The upper end of the lid 71 is inwardly curved at if so as to also provide for the closin of the recess h at the front portion of the y a. For the purpose of facilitating the removal of the cover or lid 11 the body a at its u per front portion is provided with a smal depression o. On its longitudinal side the y a ma be rovided in a well known manner wit soc ets p, p for the purpose of facilitating the manipulation and the grasping or turning of the encil sharpener. v

f the blade 9 has become dull, the screw f is loosened, therebg simultaneously releasinlg cover 13 of the recess "fresh knife taken .from the container h,

while the dull knife may be placed'into said container, whereupon, after the insertion of the cover i, the screw f magbe reinserted and the operating knife ma locked n position and the container for the supply blades is closed.

It is evident that the invention is suscepti ble of various modifications and varlatlons to suit existing conditions and the convenience of the user. .Thus for instance, the container for the exchangeable supply blades may comprise a lateral recess in the body portion which is closed by the sliding cover. The container for the suppl knives may, with a suitable thickness of t e body .portion of the device, be made of such dept that it becomes adapted for ther'eception of more than two'knives. In the form of construction shown by way of example and by the'use of only two supply blades there is the advantage that the pencil sharpener, notwithstanding the provision of the additional container, need not be of larger size-than the ordinary pencil sharpener which consists of a substantially prismatic body with conical apertures.

I claim: '1'. Pencil sharpener comprising a body' portion with an axial openm to receive a pencil to be sharpened, a bla e mounted on one side of said body portion with its cutting edge projecting into said opening, a cavity in the opposite side of said body portlon m'register with said blade, a cover for said cavity and a headed bolt with threaded end extending through a hole in said blade, a plain transverse boring of said body portion and through said cavity into a threaded hole in said cover so as to retain it on said cavity.

2. Pencil sharpener comprising a body portion with an axial openin to receive a pencil to be sharpened, a bla e mounted on one side of said body portion with its cutting edge projecting into said-opening, a

cavity. ln'the opposite side of said body portion in register with said blade, an angular cover for said cavity and a headed bolt with threaded end extending through a hole in said blade, a plaintransverse boring of said body ortion and through said cavity into a threa ed hole in said cover so as to retain it on said cavity.

In testimony whereof I afiix my signature.

HUGO DORNSEIF. 

